MartinLogan MAC 500/E user manual Tr o u b l e s h o o t i n g, Problem Probable causes Remedy

Tr o u b l e s h o o t i n g

Problem	Probable cause(s)	Remedy
	No power to fixture.	Check that power is switched on and cables
		are plugged in.
One or more of the fixtures
	Primary fuse blown (located at the mains	Disconnect fixture and replace fuse.
is completely dead.	inlet cable).
	Secondary fuse(s) blown (located on	Disconnect fixture. Check fuses on PCB and
	PCB inside base).	replace.
Fixtures reset correctly but	The controller is not connected.	Connect controller.
	XLR pin-out of the controller does not
all respond erratically or not		Install a phase-reversing cable between the
	match pin-out of the first fixture on the
at all to the controller.		controller and the first fixture on the link.
	link (i.e. signal is reversed).
		Inspect connections and cables. Correct poor
	Bad data link connection	connections. Repair or replace damaged
		cables.
	Data link not terminated with 120Ω termi-	Insert termination plug in output jack of the
	nation plug.	last fixture on the link.
Fixtures reset correctly but	Incorrect addressing of the fixtures.	Check fixture address and protocol settings.
		Bypass one fixture at a time until normal oper-
some respond erratically or
not at all to the controller.	One of the fixtures is defective and dis-	ation is regained: unplug the XLR in and out
		connectors and connect them directly
	turbs data transmission on the link.
		together. Have the fixture serviced by a quali-
		fied technician.
	XLR pin-out on fixtures does not match	Install a phase-reversing cable between the
		fixtures or swap pins 2 and 3 in the fixture that
	(pins 2 and 3 reversed).
		behaves erratically.
Magnetically indexed effect
resets correctly but wanders	Effect wheel or magnetic sensor requires	Disable effects feedback (page 13). Contact
after fixture reaches operat-	mechanical adjustment.	Martin technician for service.
ing temperature.
	The transformer setting does not match	Disconnect fixture. Check transformer setting
Mechanical effect loses	local voltage.	and correct if necessary.
position.	Mechanical train requires cleaning,	Contact Martin technician for service.
	adjustment, or lubrication.
Lamp fails to strike after		Send LAMP OFF command before sending
turning the fixture off and on	Electronic ballast does not recognize	another LAMP ON command. The lamp will
again, or after a power fail-	that the lamp is off.	strike after an 8 minute delay. See protocol for
ure. (MAC 500 E)		override if dLOF is set to OFF
	The ballast and transformer settings do	Disconnect fixture. Check ballast and trans-
	not match local AC voltage and fre-
No light and “LERR” error		former settings and correct if necessary.
	quency.
message displayed.
	Lamp blown	Disconnect fixture and replace lamp.
	Lamp not installed	Disconnect fixture and install lamp.
		Allow fixture to cool.
	Fixture is too hot.	Reduce ambient room temperature.
Lamp cuts out intermittently.		Recalibrate temperature sensors.
	The ballast and transformer settings do	Disconnect fixture. Check ballast and trans-
	not match local AC voltage and fre-
		former settings and correct if necessary.
	quency.

32 MAC 500/E User Manual